Pottery Barn Suppertime White Coffee Mugs Cups 3.5” Wide Rim Bistro Set of 4 The Pottery Barn Suppertime White Coffee Mugs Cups are a set of four traditional-style round mugs with a glossy white finish. These 3.5" wide rim cups are made of porcelain and have a 12 oz. capacity, making them perfect for all occasions. They are microwave and dishwasher safe, featuring a solid white color and the Suppertime Bistro theme. Machine washable and with a printed backstamp, these mugs are a stylish addition to any home dining set.